Beta Test
On Android, this is how you install Latin Prayer: Two short steps, once — and what you get is the full app, the same one that is on iPhone, free with nothing to pay for later. “Beta” means you see each new version early, not that anything is missing.
1 · Join the beta group — with the Google account your phone uses for the Play Store.
2 · Join the test — with that same account. On your phone, open it in the Play Store; on a computer, use the web link. Either way you confirm that you want to be a tester, and then install.
Open in the Play Store Join the test on the web
Both steps are needed: the group on its own unlocks nothing. And don’t search the Play Store for Latin Prayer — an app that is still in testing never shows up in search, which is exactly what the links above are for. Afterwards it updates through Play like any other app, and you can leave the group whenever you like.
On iPhone, Latin Prayer is simply in the App Store. The same group is worth joining there too, if you want the new versions early.